City

San Quentin, CA

2 ZIP codes  ·  Marin County  ·  California

👥2,115Population
🎂48.0Median Age
🎓23.3%College Grads▼ 40% below avg
People & Population (ACS 2023 — weighted avg)
♂ Male 92.5% Female 7.5% ♀

Race & Ethnicity

White: 29.3%Hispanic: 32.8%Black: 27.4%Asian: 5.6%Other: 3.1%Race
White29.3%
Hispanic32.8%
Black27.4%
Asian5.6%
Other3.1%

Age Breakdown

Under 5
1%
5–17
3%
18–24
7%
25–44
33%
45–64
35%
65+
15%

Key Indicators

Median Age48.0 yrs
Avg HH Size2.54
Below Poverty3.5% ▼ 66% below avg
College Grads23.3% ▼ 40% below avg
No HS Diploma33 (2.1%)
HS Graduate299 (18.9%)
Some College545 (34.5%)
Associates333 (21.1%)
Bachelors336 (21.3%)
Graduate Degree32 (2%)

Education

No HS: 2.1%HS Grad: 18.9%Some College: 34.5%Associates: 21.1%Bachelors: 21.3%Graduate: 2%Edu
No HS2.1%
HS Grad18.9%
Some College34.5%
Associates21.1%
Bachelors21.3%
Graduate2.0%
Housing & Income

Financials

Total Housing Units147
Vacant Units37

Income Distribution

$75k–$100k
86%
$150k–$200k
14%
Employment & Commute

How People Get to Work

Drove Alone
86%
Walked
14%

Commute Time

Under 15 min
14%
15–30 min
86%
About San Quentin, CA

San Quentin is a city in California, located in Marin County. The city spans 2 ZIP codes and is home to approximately 2,115 residents. It is a mature city, with a median age of 48 years.

The population of San Quentin is less-educated. 23.3% of adults hold a bachelor's degree or higher — below the national average. The community is racially diverse, with Hispanic as the largest group at 32.8%.

San Quentin, CA offers residents a cost-conscious lifestyle within California. Spread across 2 ZIP codes, the city's neighborhoods vary in character, density, and demographics — explore each ZIP code below for a detailed breakdown.

ZIP Codes in San Quentin
ZIPPopulationMedian IncomeMedian HomeMedian RentUnemp.CollegeOwner Occ.